main.cpp 范例文件

networkaccessmanagerfactory/main.cpp
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#include <QCommandLineParser> #include <QGuiApplication> #include <QNetworkAccessManager> #include <QNetworkProxy> #include <QQmlEngine> #include <QQmlNetworkAccessManagerFactory> #include <QtQuick/QQuickView> /* This example illustrates using a QQmlNetworkAccessManagerFactory to create a QNetworkAccessManager with a proxy. 用法: networkaccessmanagerfactory [-host <proxy> -port <port>] [file] */ #if QT_CONFIG(networkproxy) static QString proxyHost; static int proxyPort = 0; #endif // networkproxy class MyNetworkAccessManagerFactory : public QQmlNetworkAccessManagerFactory { public: QNetworkAccessManager *create(QObject *parent) override; }; QNetworkAccessManager *MyNetworkAccessManagerFactory::create(QObject *parent) { QNetworkAccessManager *nam = new QNetworkAccessManager(parent); #if QT_CONFIG(networkproxy) if (!proxyHost.isEmpty()) { qDebug() << "Created QNetworkAccessManager using proxy" << (proxyHost + ":" + QString::number(proxyPort)); QNetworkProxy proxy(QNetworkProxy::HttpCachingProxy, proxyHost, proxyPort); nam->setProxy(proxy); } #endif // networkproxy return nam; } int main(int argc, char ** argv) { QUrl source("qrc:view.qml"); QGuiApplication app(argc, argv); QCommandLineParser parser; #if QT_CONFIG(networkproxy) QCommandLineOption proxyHostOption("host", "The proxy host to use.", "host"); parser.addOption(proxyHostOption); QCommandLineOption proxyPortOption("port", "The proxy port to use.", "port", "0"); parser.addOption(proxyPortOption); #endif // networkproxy parser.addPositionalArgument("file", "The file to use."); QCommandLineOption helpOption = parser.addHelpOption(); parser.setSingleDashWordOptionMode(QCommandLineParser::ParseAsLongOptions); QStringList arguments = QCoreApplication::arguments(); if (!parser.parse(arguments)) { qWarning() << parser.helpText() << '\n' << parser.errorText(); exit(1); } if (parser.isSet(helpOption)) { qWarning() << parser.helpText(); exit(0); } #if QT_CONFIG(networkproxy) if (parser.isSet(proxyHostOption)) proxyHost = parser.value(proxyHostOption); if (parser.isSet(proxyPortOption)) { bool ok = true; proxyPort = parser.value(proxyPortOption).toInt(&ok); if (!ok || proxyPort < 1 || proxyPort > 65535) { qWarning() << parser.helpText() << "\nNo valid port given. It should\ be a number between 1 and 65535"; exit(1); } } #endif // networkproxy if (parser.positionalArguments().count() == 1) source = QUrl::fromLocalFile(parser.positionalArguments().first()); QQuickView view; MyNetworkAccessManagerFactory networkManagerFactory; view.engine()->setNetworkAccessManagerFactory(&networkManagerFactory); view.setSource(source); view.show(); return app.exec(); }